Surfacing-machine.



l PATENTBD JAN. 7, 190s. o. A. BDLUND. SURPACING MACHINE.

APPLICATION FILED DBO.13. 1906.

z SHEETS-SHEET 1.

C/aaJ Afd/um( No. 876,155. PATENTED JAN. '7, 1908.

C. A. EDLUND.

SURFACING MACHINE.

APPLICATION FILED DEC.13.1906.

2 SHEETS-SHEET Z.

i 0&1 fr..

UNITED STATES PATENT OFFICE.

CLAUS A. EDLUND, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE-HALF T EMIL BERNSTROM7 OF PROVIDENCE, RHODE ISLAND; HANNA EDLUND ADMINISTRATRIX OF SAID CLAUS A. EDLUND, DECEASED.

sUnFAcrNG-MACHINE.

Specification of Letters Patent.

Patented Jan.4 7, 1908.

' Application filed December 13. 1905. Serial No. 291.522.

`To all whom it may concern:

Be it known that I, CLAUS A. EDLUND, a

`citizen of the United States, residing atthe useful improvements in surfacing machines and pertalns more particularly to that class of machines employed in planing, sand-papering, polishing or otherwise dressing the surface of floors, bowling alleys and the like.

'lhis invention has for its obj ect the reduction of a sim le machine of a portable character that wi cut, grind or polish the surface 'of a floor or the like.

An essential feature ofthe machine is that it operates automatically and very rapidly and dresses a floor accurately and smoothly leaving the same straight and true and does this work without the aid of a skilled attendant.

The old style surfacing machine of this character, whose `cutters work in a horizontal plane, have but one cutter head, and when at work its action against the floor served to throw the machine off to one side making it extremely difficult to guide or control the action and direction of the same.

One very essential feature of my device isV that the above objectionable features have been overcome by the employment of two cutter heads rotated in opposite directions, or one working againstA the other, thereby perfectly balancing the pull or action of the cutters orgrinders enabling the direction of themachine to be perfectly controlled. These cutting or dressing heads are adjustably mounted on a carria e and may be driven by a motor or .in any ot er desired manner.

One of the features'of the invention when sand-paper or polishing rolls are used in the dressing heads, is that two rolls are mounted in each head both rolls being held to rotate around a common center (which is the uparound their own axis brings into action the surface of the material all around the roll. Instead of using sand-pa er rolls in the rotating heads, cutters may e used therein for planing the floor if desired, or polishing material may be applied to the rolls to wax or polish a floor in finishing.

The invention is fully set forth in this specification and more particularly pointed out in the appended claims.

In the accompanying drawings: Figure 1 is a plan view of my improved surfacing machine. Fig. 2 is a side elevation of the machine with one of the heads Ain section. Fig. 3 is a front elevation showing the arrangement of the heads and driving mechanism and floor dressing devices.` Fig. 4 is an enlarged sectional view showing the lower portion of the upright shaft and its connectlon to the horizontal shaft, also a portion of the ysurfacing rolls'and the gears by which said rolls are rotated. Fig. 5 is a reduced side elevation of the machine illustrating the manner' of vertically adjustin the surfacing devices. Fig.

side elevation of one of the 6 is an enlarge Fig. 7 is an end elevation sand-paper rolls.

in section, of the tubular spring tension core for binding the sand-paper in place around the roll. Fig. 9 is an end elevation of said core. Fig. 10 is an enlarged view illustrating the position of the spring tube in serving to bind the covering to the roll.

Referring to the drawings 10 is the body of the machine constructed somewhat similar to an ordinary Wagon body consisting of a box frame having sides and end pieces, said body being mounted on four wheels 11-11 that support said body to roll-on ordinary axles' 12. Pivoted at 13 to the rear of said body port-ion is theI apron or platform 14 thatI extends forward out through the front end of the body' ortion and 1s held to be adjusted vertica ly therein, and on the front end of this .plate is secured the two operating heads.l These heads are similar to each other in construction, the left head (see Fig. 3) includes the upright shaft 16 held to rotate in the corresponding bearing 18, and fixed tothe lower end of said upright shaft is the support member 2() in which the. horizontal ild shaft 25-25.. By this construction W ien the upright shaft 16 rotates the horizontal shaft 21 by carrying said two rolls is caused to revolve and as said rolls are revolved around the a'xis -of the upright shaft they are also caused to rotate in a direction against the cut, about their own axis by the engagement-of gear 23 on which they are mounted, with the xed gear 22. The upright bearing 19 is similar in construction to bearing 18 of the opposite head, with the except-ion that the former is enlarged at 26 forming a box or casing in which the gears 27 are mounted on the upright shaft 17. A similar gear 28 mounted on the horizontal shaft 31 transmits to the carriage its traverse motion through the worm wheel 29 mounted on the axle 12, the worm 30 and flexible connection 32. Power may be applied to run this machine from any convenient source but I have shown an electric motor 40 mounted on the carriage which may receive its current through a flexible cord from a lamp socket battery or any con; venient supply, and transmits its motion to said head through the flexible shaft 33 and gears 34, 35, 36, 37, 38 and 39. Itwill be noted in this connection thatI the weight of shafts 16, 17 and their respective blocks 2O and rolls 25, is supported solely by the respective inions 38 which are rigidly secured to said s afts and bear upon the upper ends of bearings 18, 19.. y

At 41 is the handle by which the machine may be guided by the attendant.

At 42 1s anu right bolt secured to the bottom of the bo y portion and extending up through the plate or platform 14, between the plate and body 10, is located a spring .43 of sufficient tension to raise or'support the free end of the said platform and its connected heads. Above the latform is another coil spring 44 whose tension may be adjusted by the nut 45 to overbalance the tension of spring 43 and so lower or adjust the height of bearing pressure of the said working rolls with relation to the surface they are acting upon, at the same time provide a resiliency to the heads between the twos rings rendering the same in a measure flexib e that it may yield or accommodate itself to any undue strain caused by bunches or unevenness in the floor.

My improved manner of attaching the sand-paper or covering to the rolls is as follows: A round hole is formed throughthe roll at 42 on a slight angle to its axis, see Fig. 6, in such a manner that a portion of said hole cuts through to the periphery of the roll at 44. Into this hole 1s inserted a thin tubular member 45 (see Fig. 8) slotted throughout its length at 46, thus providing two spring lips 47l and 48. At 49 1s a longitudinal key' fixed to said tube for the purpose of engaging a Wrench by which said tube may be turned in said hole. In applyin the sand-paper or other covering to this ro l one end of said covering 50 (see Fig. 10) is turned over the edge of the cut at 44, the opposite end' of the covering 51 being carried around the roll and hooked or .bent over one of the spring lips 47 in said tubular portion. A wrench is then ap lied to the said tube and the same is turne the position shown in Fig. 10 tightly drawing the said covering around the roll and simultaneously binding both ends in the said slotted portion by the pressure or spring of the tubing. i

The construction of my improved surfacing machine is extremely simple, comprising a body10 mounted on four wheels. 11. An a ron or platform 14 is ivoted in the rear of said body Yportion an is adjustably held at its oppos1te end to work vertically through the front portion of the body frame. On this apron is mounted the cutting or dressing rolls two in each head running in opposite directions. The revolving of these heads in opposite directions is also a most essential feature of my invention as it is found to be impossible to operate such heads in a practical manner except they are 'balanced by working against each other. Another feature of the invention is that both rolls in each head have a double rotation one around their own axis and the other around a common center. 'In revolving on their own axis they are preferably caused to turn against the rotation of the contacting surfaces of the rolls thereby increasing the speed of said surface and so increasing the efficiency of the machine.

I have shown and described two sets of dressing rolls, but my invention is not restricted to the use of'rolls for this purpose as cutting or polishing heads of any construction may e used, neither is my invention limited to the use of two sets of heads as these heads may be used in pairs, -,one pair constitutin a s et and any number of sets may be use without departing from the spirit or scope ofV my invention. .Neither is the invention restricted to the precise construction and arran ement of partsy herein shown and describefI nor to the various details thereof, as the same may be modified or re-arranged in various particulars, one practical embodiment of which has been erein illustrated and described without attempting to show allof the various forms in the slot intobearing sleeve and meshing with the pinions and modifications in which my invention l might be embodied. l

Having thus described my invention, what 1 I claim as new and desire to'secureby Letters Patent, is: y

1. A surfacing machine comprising a supporting frame, a vertical shaft mounted to rotate in said frame, a supporting member rigidly secured to said vertical shaft, a horizontal shaft extended through said supporting member, means for preventing rotation of said shaft oppositely disposed dressing rolls mounted on said horizontal shaft, and means for rotating each roll about said horizontal shaft during the rotation of the vertical shaft. i

2. A surfacing machine comprising a supporting frame, provided with a bearing sleeve, a vertical shaft mounted to rotate in said sleeve, a pinion secured to said shaft and resting upon the upper end of said sleeve, whereby said shaft is sup iorted, a supporting member rigidly secure( to the lower end of said shaft, a horizontally arranged shaft carried by said supporting member, means for preventing rotation of said shaft, dressing rolls, mounted on said shaft, pinions on said rolls, and a second pinion secured to said of said rolls.

3. A surfacing machine comprising a supporting frame provided with a bearing sleeve, a vertical shaft mounted to rotate in said sleeve, a pinion rigidly secured to said sleeve, a supporting member rigidly secured to the lower end of said vertical shaft, a horizontal shaft extended through said supporting member, means for preventing rotation of said shaft, oppositely disposed dressing rolls mounted on said horizontal shaft, and pinions connected with said rolls and meshing with the pinion on said bearing.

4. In a machine of the character described, a portable carriage, an actuating motor, two upright shafts, means whereby both of said shafts are driven in opposite directions by said motor, a longitudinall disposed shaft connected at the lower en( of each of said upright shafts, two Hoor dressing rolls mounted to rotate on each of said longitudinal shafts, an apron pivoted at one end in said carriage on which the operating mechanism is mounted, and means for adjusting the free end of said apron to regulate the Working pressure of the dressing rolls on the surface to be finished.

5. In a machine of the character described, a carriage, an actuating motor located on said carriage, a pair of upright shafts, means whereby both of said shafts are driven in opposite directions, a plurality of loordressing rolls connected to and revolved around ,each of said shafts, means for rotating each roll on its own axis as it is carried around said shaft, an apron pivoted at one end in said carriage on which the operating mechanism is mounted, 4means for adjusting the free end of said apron to regulate the working pressure of the dressing rolls on the surface to be finished, and means whereby said carriage may be automatically moved to earn. said rolls over the surface to be dressed.

6. lu a machine of the character described, a portable carriage, an actuating motor, two

-upright shafts, means for flexibly connecting said motor to drive said shafts, means whereb v both of said shafts are driven in opposite directions by said motor, a longitudinally` disposed shaft connected at the lower end of each of said upright shafts, two floor dressing rolls mounted to rotate on each of said longitudinal shafts, an apron pivoted at one end in said carriage on which the operating mechanism is mounted, .flexible means connected to the free end of said apron for exerting a pressure of said rolls on the surface to be operated upon, means for adjusting said pressure, and means connected to said carriage by which the same may be guided.

7. A machine of the character described, comprising a carriage, an apron )ivoted in said carriage, two se )arate sets of f oor dressing devices mounted on said apron, eac-h set of said'devices adapted to be rotated in a horizontal plane and in a direction o posite to the other, and means whereby sai apron may be raised and lowered to regulate the pressure of said dressing devices on the surface to be dressed.

8. A machine of the character described, comprising a carriage, an apron pivoted at one end in said carriage, two separate sets of lloor dressing rolls rotatably mounted on the opposite end of said apron, each set of said rolls adapted to rotate ina direction opposite to the other, a plurality of rolls in each set, means for rotating each roll about its own axis and also about a common center, and means whereby the free end of said apron may be verticall adjusted to regulate the pressure of said ressing rolls on the surface to be dressed.

9. A machine of the character described, comprising a carriage, an apron pivoted at one end in said carriage, two separate sets of floor dressing rolls rotatably mounted on the free end of said apron, means whereby the free end of said a ron may be vertically adjusted, each set o said rolls adapted to to. the other, a plurality of rolls in each set, and means for adjusting the Working presmeans for rotating each roll of a set about a' sure of said rolls. 10 common center, and also about its oWny axis, In testimony whereof I aLlXmy signature the engaging surface of each roll to move Vin in presence of two Witnesses. a direction opposite to the direction of travel CLAUS A. EDLUND. of tliesame, a carriage on which said dress Witnesses:

ing rolls are mounted whereby they are HOWARD E. BARLOW,

moved along over the surface to be dressed, E. I.' OGDEN. 

